something very toasted, such as bread, tortillas made of corn, etc. (see Molina)
IPAspelling:
totopotʃwɑːkki
Alonso de Molina:
totopochuacqui. cosa muy tostada, assi como pan, tortillas de mayz. &c. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 151r. col. 1. Thanks to Joe Campbell for providing the transcription.